TiO2 ALD decorated CuO/BiVO4 p-n heterojunction for improved photoelectrochemical water splitting

作     者：Linxing Meng Wei Tian Fangli Wu Fengren Cao Liang Li 

作者机构：School of Physical Science and TechnologyCenter for Energy Conversion Materials & Physics (CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2019年第35卷第8期

页      面：1740-1746页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (51772197, 51422206, 51372159) 1000 Youth Talents Plan Key University Science Research Project of Jiangsu Province (17KJA430013) 333 High-level Talents Cultivation Project of Jiangsu Province Six Talents Peak Project of Jiangsu Province Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) 

主　　题：Heterojunction BiVO4 Photoelectrochemical Atomic layer deposition 

摘      要：Bismuth vanadate(BiVO4)is a promising photoanode material owing to the narrow bandgap,appropriate band position,and excellent resistance against photocorrosion,however,the performance of photoelectrochemical(PEC)water splitting is largely limited by the poor carrier separation and transport *** address these issues,for the first time,we fabricate BiVO4 film/CuO nanocone p-n junctions as photoanodes by combing a facile spin-coating process and water bath *** structure strengthens the light harvesting and promotes the charge separation and transport *** surface defects states are passivated by coating conformally ultrathin TiO2 onto CuO surface through atomic layer deposition(ALD)*** from the favorable morphology,energy band,and surface treatment,the BiVO4/CuO/TiO2 heterojunction generates an improved photocurrent that is much higher than pure *** detailed mechanism investigations indicate that the synergetic optimization of charge separation and injection efficiency in the bulk and surface of photoelectrodes can significantly improve the performance of PEC cells.